Metformin is basically any doc's default. It's the first pill they try, but it is by no means the only one they can give you. So if it doesn't agree with you, you've got options. For me, Metformin was... Not good. They gave me gliclazide when after several weeks I was still absolutely miserable. (...I lived in the loo). But I think there's almost 20 medicinal options out there.
I was lucky: I was diagnosed when absolutely everyone was on vacation, and I had to figure this whole diabetes thing out by myself while they were gone. Would've gone a lot quicker if I'd found this place then, but the Dutch equivalent wasn't much help, so I didn't think to try the UK forums for help. My mistake. In any case... I read a lot about various T2 diets, and the one thing they all had in common was a reduction in carbs. Which makes sense, once you know all carbs turn to bloodsugar. Not just straight sugar, but starches too. And we can't process that back out again, so it just floats around in our bloodstream, doing damage. And it doesn't have to. Just eat less carbs. (It really is that insanely simple, believe it or not.). After 3 months I could stop the gliclazide, and even my cholesterol was better, so I could drop the statins as well. Two years on I've had a non-diabetic HbA1C (average of 3 months, one of the tests you'll want the numbers of) for almost all that time. When I started the diet I didn't quite know what I was doing, so there were a few stumbles, but.... I never went back up. So practically speaking, what does that mean for meals? Skip the carbs. Potatoes, bread, cereal (including wheetabix, muesli, oats), rice, pasta, corn, fruits, (save for berries, in moderation, especially good with double cream or full fat greek yoghurt, as fats slow down carb uptake and will prevent or lessen a sugar spike), basically anything that comes from wheat, besides the obvious sugars. Yeah, that's a big chunk of your menu gone eh, I know. But. There's still meat, fish, eggs, butter, cheese, leafy greens and above-ground veggies, nuts, avocado, olives, and extra dark chocolate. (Lindt 85% is nice!). Meals could look like this: Eggs with bacon, cheese, mushrooms, cherry tomatoes, spinach or whatver tickles your low-carb fancy. Salmon maybe? That's a big breakfast that'll tie you over till lunch, which could be a salad with canned tuna (don't eat the can!), mayo, capers, olives and avocado. Another rather filling meal. Dinner? Meat, fish, whatever's not overly processed or breaded. Check for additives, sometimes meat gets bulked up with sugar, flower or crumbs of something or other. I've found cauliflower rice remarcably versatily, it's replaced pasta, rice and spuds in our house. Broccoli-rice is good too. Usually toss cheese and bacon in both varieties, and whatever spices I feel like throwing in. All those meals are low carb and won't spike you. Snacks? Walnuts, pecans, extra dark chocolate, cheese, olives, salami... Sound good?
I mentioned spikes a few times now and that brings me to the next point: as a T2 your doc isn't likely to provide you with a meter (NHS doesn't pay for them unless you use insulin or take hypo-inducing drugs), so like most people on this forum, it's really worth it to self-fund. That way you know where you're starting from and where you're heading, what foods agree with you and which don't... Test before a meal and 2 hours after first bite: If your bloodsugars (BS for short here) go up more than 2 mmol/l, that's a spike. And if you stay under 2 mmol/l, that meal was absolutely perfect and can be put on your safe list. It's a lot of testing in the first months, but it's an invaluable tool.
So... Bottom line, you've got options. There are more meds than just metformin, which is fine for some people, not so fine for others, and you won't know until you try it of course. Just keep in mind that only medication, without a change in diet, meansT2 is still a progressive disease and while bloodsugars may be under control, there's still a risk of diabetic complications. When you add a change in diet to the mix, remission and who knows, maybe even going med-free while avoiding complications, is actually in the cards. I'm in remission, so are quite a few people here... I'm still a T2, I'll always be diabetic, and if I eat a piece of birthday cake I'll have a sugar spike that'll make my head spin, but.... I don't feel like I'm missing out with the foods I eat, my BG is non-diabetic and has been for almost 2 years now, no complications. I have more energy than I used to have, I lost over 25 kilo's, I can walk proper distances now, which I couldn't do for years, my cholesterol is good, liverfunction and kidey are fine... They weren't before, I was a wreck... But I'm doing pretty good now. And I'm not alone here: there are many, many people like that here.
Diabetes is no joke, and yeah, it'll take a while for the diagnosis to sink in. Grief over it is perfectly normal, confusion at the load of info to process too... But you're not alone in this. You'll get there.
Good luck,
Jo